/* 全局样式 */
*{
    padding: 0;
    margin: 0;
}
body {
    font-size: 12px;
    font-family: "Microsoft Yahei", "Hiragino Sans GB", Helvetica, "Helvetica Neue", 微软雅黑, Tahoma, Arial, sans-serif;
}
a {
    color: #14191e;
    text-decoration: none;
}
a:hover {
    color: #f01400;
}
.box{
    overflow: hidden;
}
/* 头部 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 2;
    height: 60px;
    background-color: #FAFAFA;
    color: #292E35;
}
.header__logo {
    float: left;
    height: 40px;
    margin: 10px 0 0 10px;
    padding: 0 0 0 50px;
    background: url("./../imgs/logo.png") left top no-repeat;
    display: block;
    font-size: 18px;
    color:darkgray;
    line-height: 40px;             /* 垂直居中 */
}
.header__nav {
    float: right;
    margin: 10px 10px 0 0;
    position: relative;
}
.header__nav-item {
    float: left;
    padding: 0 20px;
    font-size: 14px;
    display: inline-block;
    width: 60px;
    text-align: center;
    line-height: 40px;
}
.header__nav-item:hover {
    color: #f03131;
}
.header__nav-item_i_1{
    color: #f03131;             /* 第一个标签字体默认红色 */
}

.header__nav-item_custom_button {
    color: #fff;
    background: #000;
    width: 60px;
    margin: 0 20px;
    border-radius: 5px;
}
.header__nav-item_custom_button:hover {
    color: #fff;
}
/* 第一屏 */
.screen-1 {
    color: rgb(255,255,255);
    height: 800px;
    background-color: #ececec;
    background: url(../imgs/bg-screen-1.png) no-repeat center bottom;
    background-size:cover;
    text-align: center;
    position: relative;
}
.screen-1__wrap {
    max-width: 1200px;
    min-width: 800px;
    margin: 0 auto;             /* 水平居中 */
    height: 100%;
    position: relative;
    overflow: hidden;
}
.screen-1__heading {
    position: absolute;
    top: 160px;
    width: 100%;
    font-size: 42px;
}
.screen-1__heading b{
    color: #f01414;
    font-weight: normal;
}
.screen-1__phone {
    position: absolute;
    bottom: 180px;
    width: 1375px;
    height: 305px;
    left: 50%;
    margin-left: -687px;             /* 水平居中 */
    background: url(../imgs/screen-1-phone.png) no-repeat center ;
    background-size: cover;
    z-index: 1;
}
.screen-1__shadow {
    position: absolute;
    bottom: 30px;
    width: 1233px;
    height: 411px;
    left: 50%;
    margin-left: -616px;             /* 水平居中 */
    background: url(../imgs/screen-1-shadow.png) no-repeat center ;
}
/* 第二屏 */
.screen-2 {
    color: rgb(7,17,27);
    height: 800px;
    background-color: #fafafa;
    text-align: center;
}
.screen-2__wrap {
    max-width: 1200px;
    min-width: 800px;
    margin: 0 auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.screen-2__heading {
    position: absolute;
    top: 80px;
    width: 100%;
    font-size: 42px;
    color: #f01414
}
.screen-2__subheading {
    width: 100%;
    top: 190px;
    position: absolute;
    font-size: 16px;
}
.screen-2__phone{
    width: 800px;
    height: 873px;
    background: url(../imgs/bg-screen-2.png) no-repeat;
    position: absolute;
    left: 50%;
    margin-left: -464px;
    top: 270px;
}
.screen-2__point{
    font-size: 24px;
    color: #4D555d;
    position: absolute;
    width: 100px;
}
.screen-2__point_i_1{
    top: 180px;
    left: -120px;
    padding-right: 112px;
    background: url(../imgs/icon-point-right.png) no-repeat center right;
}
.screen-2__point_i_2{
    top: 37px;
    left: 584px;
    padding-left: 112px;
    background: url(../imgs/icon-point-left.png) no-repeat center left;
}
.screen-2__point_i_3{
    top: 340px;
    left: 680px;
    padding-left: 112px;
    background: url(../imgs/icon-point-left.png) no-repeat center left;
}
/* 第三屏 */
.screen-3 {
    color: rgb(255,255,255);
    height: 800px;
    background-color: #a71316;
}
.screen-3__wrap {
    max-width: 1200px;
    min-width: 800px;
    margin: 0 auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.screen-3__heading {
    position: absolute;
    top: 90px;
    left: 10px;
    width: 580px;
    font-size: 36px;
}
.screen-3__subheading {
    position: absolute;
    top: 170px;
    left: 10px;
    width: 580px;
    font-size: 16px;
}
.screen-3__phone{
    width: 729px;
    height: 900px;
    position: absolute;
    top: 200px;
    left: 465px;
    background: url(../imgs/bg-screen-3.png) no-repeat;
}
.screen-3__features {
    position: absolute;
    width: 328px;
    height: 288px;
    bottom: 140px;
    left: 5px;
    margin-left: 6px;
}
.screen-3__features-item-number{
    height: 36px;
    font-size: 36px;
    line-height: 36px;
    padding: 32px 0 9px 0;
    display: block;
}
.screen-3__features-item {
    float: left;
    width: 138px;
    height: 118px;
    border: 1px solid #D97173;
    border-radius: 3px;
    text-align: center;
    line-height: 14px;
    font-size: 14px;
    margin: 0 24px 24px 0;
    color: #fff;
}

/* 第四屏开始 */
.screen-4{
    background-color: #fff;
    text-align: center;
    height: 800px;
}
.screen-4__wrap {
    max-width: 1200px;
    min-width: 800px;
    margin: 0 auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.screen-4__heading {
    position: absolute;
    top: 80px;
    width: 100%;
    font-size: 42px;
    color: #f01414;
}
.screen-4__subheading {
    position: absolute;
    top: 180px;
    width: 100%;
    font-size: 16px;
}
.screen-4__type {
    width: 1300px;
    margin-left: 30px;
    height: 270px;
    bottom:220px;
    position: absolute;
    font-size: 16px;
    text-align: center;
}
.screen-4__type-item {
    width: 220px;
    height: 270px;
    float: left;
    margin-right: 90px;
    position: relative;
}
.screen-4__type-item-name{
    width: 100%;
    height: 40px;
    position: absolute;
    top: 300px;
    font-size: 16px;
    line-height: 16px;
    color: #2c3238;
}
.screen-4__type-item-storage{
    width: 100%;
    height: 40px;
    position: absolute;
    top: 328px;
    font-size: 9px;
    line-height: 9px;
    color: #93999f;
}
.screen-4__type .photo{
    width: 240px;
    height: 270px;
    position: absolute;
    left: 0;
    top: 0;
}
.screen-4__type-item_i_1 {
    background: url("../imgs/phone-1.png") center left no-repeat;
}
.screen-4__type-item_i_2 {
    background: url("../imgs/phone-2.png") center left no-repeat;
}
.screen-4__type-item_i_3 {
    background: url("../imgs/phone-3.png") center left no-repeat;
}
.screen-4__type-item_i_4 {
    background: url("../imgs/phone-4.png") center left no-repeat;
}
/* 第五屏 */
.screen-5 {
    height: 800px;
    text-align: center;
    overflow: hidden;
    background: #d9dde1;
    position: relative;
}
.screen-5__back{
    width: 100%;
    height: 370px;
    background: url(../imgs/bg-screen-5.png) no-repeat bottom center ;
    background-size: cover;
    position: absolute;
    bottom: -100px;
}
.screen-5__wrap {
    max-width: 1200px;
    min-width: 800px;
    margin: 0 auto;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.screen-5__heading {
    position: absolute;
    top: 180px;
    width: 100%;
    font-size: 42px;
    color: #f01414;
}
.screen-5__subheading {
    position: absolute;
    top: 270px;
    width: 100%;
    font-size: 16px;
}
/* 立即购买 */
.buy {
    height: 80px;
    padding: 120px 0;
    background: url(../imgs/bg-screen-buy.png) no-repeat bottom center #2b333b;
}
.buy__button:hover,
.buy__button {
    width: 240px;
    height: 80px;
    line-height: 80px;
    text-align: center;
    font-size: 24px;
    color: #fff;
    border-radius: 3px;
    margin: 0 auto;
    display: block;
    background-color: #f01414;
    transition:all .5s;
}
.buy__button:hover{
    box-shadow: 0 10px 10px rgba(0,0,0,.5);
    transform:translate(0,-5px);
}
/* 尾部 */
.footer {
    height: 80px;
    line-height: 80px;
    background-color: #07111b;
    text-align: center;
    color: #fff;
}
/* 右侧导航 */
.outline {
    position: fixed;
    padding: 5px 10px;
    bottom: 120px;
    right: 0;
    z-index: 1;
    background-color: #fff;
    box-shadow: 0 4px 12px 0 rgba(7, 17, 27, 0.1);
}

.outline__item {
    display: block;
    width: 40px;
    height: 30px;
    line-height: 30px;
    padding: 5px 0;
    background: rgb(255,255,255);
    margin: 5px 0 0;
    border-top: 1px solid #eee;
    text-align: center;
    color: #93999f;
}
.outline__item:first-child{
    border:none;
}
.outline__item_status_active{
    color: #f01400;
}